The latest and lightest in battery technology Lithium Ion (Li-Ion) batteries provide superior talk and standby times. They can also be recharged at any time without suffering memory effect a condition that can sap a battery’s performance over time. Use as a replacement or extra battery for emergencies. Offers up to 180 minutes talk time and 150 hours standby time. Kyocera Standard Li-Ion Battery - TXBAT10121 also includes:Recharge at any time without losing performanceConvenient replacement or extra battery for emergenciesUp to 180 minutes talk time and 150 hours standby time